NH41B-1808
A Catalog: Centroid Location of Large-scale Landslide during Typhoon Season in Taiwan from 2005-2012
A Catalog: Centroid Location of Large-scale Landslide during Typhoon Season in Taiwan from 2005-2012
Thursday, 17 December 2015
Poster Hall (Moscone South)
Abstract:
It is a subtropical climate from May to October in Taiwan and in average four typhoons may strike during this period every year. It is favorable to trigger of landslide activity due to heavy rainfall. Seismological studies have established to detect seismic signals emitted by landslide that recorded by local seismic stations. In this study, we analyzed the continuous seismic signals from the Broadband Array in Taiwan for Seismology (BATS) during typhoon period, and performed a systematic time-frequency analysis to manually identify landslide events with neartriangular-shaped spectrograms. Then, we use cross-correlation-based method(Landquake Epicenter Determination; LED) to locate the landslide events, which were recorded by at least three stations. With a combination of spatial coverage and temporal resolution in our seismologically determin ed landslide catalog, it can enable us to explore the temporal links between landslides and rainfall. We also establish the relationship between seismic parameter (e.g. peak ground velocity) and collapse areaof landslides.